#define _CRT_SECURE_NO_WARNINGS 1


double add(double a, char ch, double b)
{
	return a + b;
}

double diff(double a, char ch, double b)
{
	return a - b;
}

double mult(double a, char ch, double b)
{
	return a * b;
}

double divid(double a, char ch, double b)
{
	return a / b;
}